Navigation in a 1999 Seville STS ?

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
Cadillac Seville / Cadillac Eldorado Forum Discussion, Navigation in a 1999 Seville STS ? in Past Cadillac Vehicle Discussion; Curious, is it possible, and if so what all would be involved to swap my standard BOSE headunit in my ...
  1. #1
    SevillianSTS is offline Cadillac Owners Connoisseur
    Automobile(s): 2007 CTS-V
    Join Date
    Aug 2005
    Northern IN

    Navigation in a 1999 Seville STS ?

    Curious, is it possible, and if so what all would be involved to swap my standard BOSE headunit in my 99 Seville STS, with the touch-screen head-unit that comes in the 03-04 Sevilles ?
    Other than the head unit, would I need to purchase any other modules, or GPS antenna ?


  2. Remove Advertisements

  3. #2
    N*Caddy's Avatar
    N*Caddy is offline Cadillac Owners Master
    Automobile(s): 1997 Cadillac STS (BOSE w/AUX In, Massage Seats, URPAS, "Z")
    Join Date
    Nov 2006
    Toronto, Canada

    Re: Navigation in a 1999 Seville STS ?

    The DVD Denso NAV. unit has a slightly different pinout (same connector though). You can not just plug the NAV unit in, you need to make a adapter harness that swaps some pins in the connector. You also need to add a VSS wire and optionally if you want AUX input (Audio/Video) you need to wire that too. Obviously you will need a GPS antenna. The CD changer will not be compatible anymore, you need to rewire the (E+C data wire to the car data bus - also done in that adapter harness) and obviously change the CD Changer with a '02-'03 one.
    All in all about a good part of a day of work providing you have all the parts. If not new, you also need to have somebody with a TechII scan tool clean the old VIN from the NAV unit.

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts